From: bors <bors@rust-lang.org>
Date: Tue, 1 May 2018 18:32:06 +0000 (+0000)
Subject: Auto merge of #5451 - DarkDrek:add_doc_clean, r=alexcrichton
X-Git-Tag: archive/raspbian/0.35.0-2+rpi1~3^2^2^2^2^2^2^2~22^2~1^2~32
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Auto merge of #5451 - DarkDrek:add_doc_clean, r=alexcrichton

Add cargo clean --doc

Implements #5449.
It only removes the doc directory and therefore keeps all other build artifacts intact.
When `--doc` is used all other options are ignored.

My test case is mostly copy&paste from `clean_release` so maybe the `.toml`s can be simplified.
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acea5e2f3c3bdd98ae3d1faf36a4499791acbd72